blog

from django.contrib.auth.models import User  # For logging purposes

from django.utils import translation

from django.template.defaultfilters import slugify

from django.db import models

import datetime

import os

def post_title_directory(instance, filename):

    """ Files will be uploaded to MEDIA_ROOT/blog/<year of publishing>/<blog

    title>

    The blog title is determined by the text before the first period (".") in

    the filename. So if the file has the name "Trains are bæ.en.md", the file

    will be stored in "blog/<this year>/Trains are bæ". Name your files

    properly!

    It should also be noted that all files are stored in the same folder if they

    belong to the same blogpost, regardless of language. The titles that are

    displayed to the user however, should be the titles of the files themselves,

    which should be in the native language. So if a blog post is titled

    "Universities of Belgium", its Dutch counterpart should be titled

    "Universiteiten van België", so the correct title can be derived from the

    filename.

    Recommended way to name the uploaded file: "<name of blog post in language

    it's written>.org". This removes the maximum amount of redundancy (e.g. the

    language of the file can be derived from the title, no ".fr.org" or something

    like that necessary), and can directly be used for the end user (the title

    is what should be displayed).

    """

    english_file_name = os.path.basename(instance.english_file.name) # TODO: Test if this returns the file name!

    english_title = english_file_name.rpartition(".")[0]

    year = datetime.date.today().year

    return "blog/{0}/{1}/{2}".format(year, english_title, filename)

class Post(models.Model):

    """ Represents a blog post. The title of the blog post is determnined by the name

    of the files.

    A blog post can be in 5 different languages: German, Spanish, English, French,

    and Dutch. For all these languages, a seperate field exists. Thus, a

    translated blog post has a seperate file for each translation, and is

    seperated from Django's internationalization/localization system.

    Only the English field is mandatory. The others may contain a value if a

    translated version exists, which will be displayed accordingly.

    """

    published = models.DateTimeField(auto_now_add=True)

    english_file = models.FileField(upload_to=post_title_directory, blank=False)

    dutch_file = models.FileField(upload_to=post_title_directory, blank=False)

    french_file = models.FileField(upload_to=post_title_directory, blank=True)

    german_file = models.FileField(upload_to=post_title_directory, blank=True)

    spanish_file = models.FileField(upload_to=post_title_directory, blank=True)

    title_en = models.CharField(max_length=64, unique=True, blank=False)

    title_nl = models.CharField(max_length=64, unique=True, blank=False)

    title_fr = models.CharField(max_length=64, blank=True)

    title_de = models.CharField(max_length=64, blank=True)

    title_es = models.CharField(max_length=64, blank=True)

    # PostgreSQL sees two null values as not unique, therefore I can't ask for unique names.

    slug_en  = models.SlugField(unique=True, blank=False, allow_unicode=True)

    slug_nl  = models.SlugField(unique=True, blank=False, allow_unicode=True)

    slug_fr  = models.SlugField(blank=True, allow_unicode=True)

    slug_de  = models.SlugField(blank=True, allow_unicode=True)

    slug_es  = models.SlugField(blank=True, allow_unicode=True)

    def __str__(self):

        return self.slug("en")

    def text_file(self, language_code=translation.get_language()):

        if language_code == "en":

            return self.english_file

        elif language_code == "nl":

            return self.dutch_file

        elif language_code == "de":

            if self.german_file is None:

                return self.english_file

            else:

                return self.german_file

        elif language_code == "fr":

            if self.french_file is None:

                return self.english_file

            else:

                return self.french_file

        elif language_code == "es":

            if self.spanish_file is None:

                return self.english_file

            else:

                return self.spanish_file

        return self.english_file

    def title(self, language_code=translation.get_language()):

        if language_code == "en":

            return self.title_en

        elif language_code == "nl":

            return self.title_nl

        elif language_code == "de":

            if self.title_de == "":

                return self.title_en

            else:

                return self.title_de

        elif language_code == "fr":

            if self.title_fr == "":

                return self.title_en

            else:

                return self.title_fr

        elif language_code == "es":

            if self.title_es == "":

                return self.title_en

            else:

                return self.title_es

        return self.title_en

    def slug(self, language_code=translation.get_language()):

        """ Returns a slug of the requested language, or None if no version exists in that language. """

        if language_code == "en":

            return self.slug_en

        elif language_code == "nl":

            return self.slug_nl

        elif language_code == "de":

            if self.slug_de == "":

                return self.slug_en

            else:

                return self.slug_de

        elif language_code == "fr":

            if self.slug_fr == "":

                return self.slug_en

            else:

                return self.slug_fr

        elif language_code == "es":

            if self.slug_es == "":

                return self.slug_en

            else:

                return self.slug_es

        return self.slug_en

class Comment(models.Model):

    """ Represents a comment on a blog post.

    Comments are not filtered by language; a

    comment made by someone reading the article in Dutch, that's written in

    Dutch, will show up (unedited) for somebody whom's reading the Spanish

    version.

    """

    date = models.DateTimeField(auto_now_add=True)

    name = models.CharField(max_length=64)

    text = models.TextField(max_length=1000)  # Should be more than enough.

    post = models.ForeignKey(

        Post,

        on_delete=models.CASCADE,

        null=False,

        )

    class meta:

        ordering = ['date']  # When printed, prints the oldest comment first.

class FeedItem(models.Model):

    """ An item that shows up in the RSS feed."""

    title = models.CharField(max_length=64)

    added = models.DateTimeField(auto_now_add=True)

    description = models.CharField(max_length=400)

    link = models.URLField()